Portion of a footwear sole



FIG. 1 is a perspective view of the portion of a footwear sole embodying the new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a front elevational view thereof; and,

FIG. 6 is a rear elevational view thereof.

FIGS. 1-6 show portions of an upper and an outsole in broken lines. The upper and outsole are shown for environmental purposes and do not form any part of the claimed design. 

The ornamental design for portion of a footwear sole, as shown and described. 